CT of the thorax, plain and post contrast- The main bronchus of the right middle lobe emerges in a ventral direction from the
bifurcation. The bronchus is dilated with an abrupt ending and collapsed lumen 5 mm
after its origin. There is regional lobar opacification and volume loss at this level. Air
filled bronchi are recognized few centimeters distal to the abrupt collapse again. The
distal portion of the right middle lobe is aerated but reveals low volume and is
displaced caudally between the right caudal and accessory lung lobes.
There is moderate bilaterally symmetric pleural effusion.
The remainder of the lung lobes do not reveal abnormalities except for positional
atelectasis.
The mediastinal structures are within normal limits.